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/*
* Copyright 2007 - 2018 ETH Zuerich, CISD and SIS.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.systemsx.cisd.hdf5.cleanup;
/**
* A class that implements the logic of cleaning up a resource even in case of an exception but
* re-throws an exception of the clean up procedure only when the main procedure didn't throw one.
* <code>CleanUpRunner</code>s can be stacked.
* <p>
* <em>This is an internal implementation class that is not meant to be used by users of the library.</em>
*
* @author Bernd Rinn
*/
public final class CleanUpCallable
{
/**
* Runs a {@link ICallableWithCleanUp} and ensures that all registered clean-ups are performed
* afterwards.
*/
public <T> T call(ICallableWithCleanUp<T> runnable)
{
final CleanUpRegistry registry = new CleanUpRegistry();
boolean exceptionThrown = true;
try
{
T result = runnable.call(registry);
exceptionThrown = false;
return result;
} finally
{
registry.cleanUp(exceptionThrown);
}
}
}
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